struts2—配置struts2自定义拦截器实现登录拦截1

自定义拦截器

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;

//配置不拦截登陆方法
//拦截登陆以外的所有方法
public class LoginInterceptor extends MethodFilterInterceptor {
	@Override
	protected String doIntercept(ActionInvocation invocation) throws Exception {		
		//校验是否登陆		
		//1 获得session
		Object object = ActionContext.getContext().getSession().get("user");
		//2 获得登陆标识
		//3 判断标识是否存在
		if(object != null){
			//存在=>放行
			return invocation.invoke();
		}
		//不存在=>拦截,重定向到登陆页面
		return "toLogin";
	}
}

struts.xml

<?xml version="1.0" encoding="UTF-8"?>
   <!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">
	
<struts>
	<!-- 开启开发模式 -->
	<constant name="struts.devMode" value="true"></constant>
	
	<package name="crm" namespace="/" extends="struts-default" >
		<interceptors>
			<!-- 注册拦截器 -->
			<interceptor name="loginInterceptor" class="cn.cdw.web.interceptor.LoginInterceptor"></interceptor>
			<!-- 配置拦截器栈 -->
			<interceptor-stack name="myStack">
				<interceptor-ref name="loginInterceptor">
					<!-- 指定不拦截登陆(login)方法 -->
					<param name="excludeMethods">login</param>
				</interceptor-ref>
				<interceptor-ref name="defaultStack"></interceptor-ref>
			</interceptor-stack>
		</interceptors>
			<!-- 指定默认拦截器栈 -->
		<default-interceptor-ref name="myStack"></default-interceptor-ref>
		
		<!-- 配置全局结果集 -->
		<global-results>
			<result name="toLogin" type="redirect"  >/login.jsp</result>
		</global-results>
		
		<!-- 全局异常映射 -->
		<global-exception-mappings>
			<!-- 当出现java.lang.RuntimeException异常时,转发到error结果 -->
			<exception-mapping result="error" exception="java.lang.RuntimeException"></exception-mapping>
		</global-exception-mappings>
		
		<action name="CustomerAction_*" class="cn.cdw.web.action.CustomerAction" method="{1}" >
			<result name="list" >/jsp/customer/list.jsp</result>
			<!-- 重定向Action -->
			<result name="toList" type="redirectAction" >
				<param name="actionName">CustomerAction_list</param>
				<param name="namespace">/</param>
			</result>
		</action>
		<action name="UserAction_*" class="cn.cdw.web.action.UserAction" method="{1}" >
			<result name="toHome" type="redirect" >/index.jsp</result>
			<result name="login"  >/login.jsp</result>
			<result name="error"  >/login.jsp</result>
		</action>
	</package>
	
</struts>

UserAction.java

import javax.servlet.ServletContext;

import org.apache.struts2.ServletActionContext;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

import cn.cdw.domain.User;
import cn.cdw.service.CustomerService;
import cn.cdw.service.UserService;
import cn.cdw.service.impl.UserServiceImpl;

public class UserAction extends ActionSupport implements ModelDriven<User> {
	private User user = new User();
	
	//登陆方法
	public String login() throws Exception {
		//1 获得servletContext对象
		ServletContext sc = ServletActionContext.getServletContext();
		//2 调用工具方法从sc中获得applicationContext容器
		WebApplicationContext ac = WebApplicationContextUtils.getWebApplicationContext(sc);
		//3 从容器中获得对象
		UserService us = (UserService) ac.getBean("userService");
		//----------------------------------------------------------------------------------
		//1 调用Service执行登陆逻辑
		User existU = us.login(user);
		//2 将返回的User对象放入session域中
		ActionContext.getContext().getSession().put("user", existU);
		//3 重定向到项目首页
		return "toHome";
	}

	@Override
	public User getModel() {
		return user;
	}

}